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1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution.
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3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible.
4. Use [code] tags to format code blocks.

Blisse

Canada3710 Posts

November 12 2014 20:18 GMT

#10901

My problem is that you're trading off readability for compiler debugging. Since we spent 2 pages talking about the Hungarian notation I would still prefer x == false to false == x because reading x is false is much more intuitive than false is x.

MysteryMeat1

United States3292 Posts

November 12 2014 20:43 GMT

#10902

So i started learning ruby on my own and was doing just a basic 9 hour course to introduce syntax and stuff one of the erros that I ran into in this code

+ Show Spoiler +

print "Gimme the string boy:"
user_input = gets.chomp.downcase!
if user_input.include? "s"
user_input.gsub!(/s/, "th")
else
puts "no 's' in your string"
end
puts "adios, #{user_input}!"

was that if i put in a lower case string it would give an error that said include? not defined which didn't make any sense to me but it would work if the string was uppercase to begin with. Am i gonna learn why this occurs later or am i missing something basic?

supereddie

Netherlands151 Posts

November 12 2014 21:19 GMT

#10903

Just use google to find the answer?

+ Show Spoiler +

http://www.ruby-doc.org/core-2.1.4/String.html#method-i-downcase-21

Alzadar

Canada5009 Posts

November 12 2014 21:25 GMT

#10904

Ugh Ruby.

mystery = 4

def mystery
  return 2
end

puts mystery

MysteryMeat1

United States3292 Posts

November 13 2014 00:32 GMT

#10905

On November 13 2014 06:19 supereddie wrote:
Just use google to find the answer?

+ Show Spoiler +

http://www.ruby-doc.org/core-2.1.4/String.html#method-i-downcase-21

I don't think thats quite it, the downcase method works and prints out a downcase version of my string and then goes through the program correctly. Its when my string is already downcased that I get an error and nothing happens.

Manit0u

Poland17871 Posts

November 13 2014 01:25 GMT

#10906

On November 13 2014 09:32 MysteryMeat1 wrote:

Show nested quote +

What happens if you put this after downcasing your string and before the rest of the code?


unless user_input.nil?

Obviously, you'll need an end there too

CatNzHat

United States1599 Posts

November 13 2014 01:32 GMT

#10907

On November 13 2014 03:25 sabas123 wrote:
(false == somevar) makes no logical sense in normal langauges?

(false == somevar) can make sense in some situations where you're similar sanity checks at the start of functions and the operand is predictable. Instead of having to read

if(somevar ==

before I get to the actual information I care about on that line I can simply read

if(condition

and know what the rest of the line will be.

Just playing devil's advocate, though I have run into this pattern from time to time when contributing to open source javascript libraries.

CatNzHat

United States1599 Posts

November 13 2014 01:37 GMT

#10908

On November 13 2014 06:25 Alzadar wrote:
Ugh Ruby.

mystery = 4

def mystery
  return 2
end

puts mystery

Ruby looks for variables first, then functions.

You should never have variables with the same name as functions within the same scope.
Also, no need for the return keyword.

phar

United States1080 Posts

November 13 2014 01:44 GMT

#10909

yoda code is not useful unless your coding environment has shit static analysis that won't catch assignment errors.

If you have shit static checking that won't catch assignment errors, first see if that can be improved, because it will catch other things which yoda code doesn't help.

CatNzHat

United States1599 Posts

November 13 2014 01:46 GMT

#10910

On November 13 2014 05:43 MysteryMeat1 wrote:
So i started learning ruby on my own and was doing just a basic 9 hour course to introduce syntax and stuff one of the erros that I ran into in this code

+ Show Spoiler +

print "Gimme the string boy:"
user_input = gets.chomp.downcase!
if user_input.include? "s"
user_input.gsub!(/s/, "th")
else
puts "no 's' in your string"
end
puts "adios, #{user_input}!"

downcase! returns nil if it doesn't change anything (if the string is all lowercase already).
You're also assigning results of destructive (bang!) operations to variables when you appear to be expecting the results of the non-destructive versions.

Here's a simplified version that utilizes destructive methods:

user_input = gets.chomp.downcase
puts "no 's's' in your string." unless user_input.gsub!(/s/, "th")
puts "adios, #{user_input}!"

ThatGuy

Canada695 Posts

November 13 2014 02:30 GMT

#10911

I've actually seen (false == somevar) before and found that curious, and asked the person why that was their style. They told me that writing the statement in that order can force the compiler to prevent a potential logical error due to a typo. For example, writing (somevar = false) instead of (somevar == false) will still compile, unlike (false = somevar).

EDIT: Yerch, apparently already been said >_>

nunez

Norway4003 Posts

November 13 2014 03:07 GMT

#10912

the function overload type_trait trick appears and is explained here ~4.09. even incoorporates ellipsis to get default behaviour, that's pretty nifty.

ZenithM

France15952 Posts

November 13 2014 03:07 GMT

#10913

Does someone here know of cheap solutions for personal cloud computing with by hour pricing and which can provide at least 8 (better with 16) cores, and more than 30 GB of RAM? I looked at Google Computing Platform, Amazon EC2 and stuff like that, does anyone have feedback on that?

Blisse

Canada3710 Posts

November 13 2014 03:14 GMT

#10914

On November 13 2014 12:07 ZenithM wrote:
Does someone here know of cheap solutions for personal cloud computing with by hour pricing and which can provide at least 8 (better with 16) cores, and more than 30 GB of RAM? I looked at Google Computing Platform, Amazon EC2 and stuff like that, does anyone have feedback on that?

http://azure.microsoft.com/en-us/pricing/details/cloud-services/

not cheap but if you want ram and 16 cores

ZenithM

France15952 Posts

November 13 2014 03:30 GMT

#10915

Oh yeah, I forgot Azure, I did check that, but thank you.

Blisse

Canada3710 Posts

November 13 2014 03:37 GMT

#10916

ah, check https://www.digitalocean.com/pricing/ too then

Manit0u

Poland17871 Posts

November 13 2014 04:58 GMT

#10917

Amazon EC2 and S3 services are decent.

CatNzHat

United States1599 Posts

November 13 2014 05:17 GMT

#10918

Spot EC2 instances are the cheapest per power, but they can cease to exist at any point in time as supply/demand fluctuates.

If you're doing distributed fault tolerant computing with like a Spark cluster or something then Spot instances can be the way to go.

CatNzHat

United States1599 Posts

November 13 2014 05:21 GMT

#10919

Depending on what you're trying to do and how much 'ops' work you want to do Digital Ocean could be a good option, the setup is super easy and you can add/remove resources from a 'droplet' without having to power it down.

Manit0u

Poland17871 Posts

November 13 2014 08:45 GMT

#10920

Have any of you tried Rust yet? Looks pretty awesome at first glance.